We're dividing 81325881 by 198 
The aim is to understand the frequency of 198 in 81325881.

Let's proceed to step 1:
198 goes into 8 0 times with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Append the next digit (1) from the dividend to 8 and continue with: 81 / 198

Going ahead to step 2:
198 can be fit into 81 0 times, resulting in a remainder of 81.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 81 to get 81.
Include the next digit (3) from the dividend after 81, then repeat: 813 / 198

On to step 3:
198 goes into 813 4 times with a remainder of 21.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
The remainder is 21 after subtracting 792 from 813.
Bring next digit (2) of the dividend behind the 21 and repeat the process: 212 / 198

On to step 4:
If we divide 212 by 198, we get 1 and a remainder of 14.
Record the quotient 1 as the next digit in the result. 
Result so far: 41.0
The remainder is 14 after subtracting 198 from 212.
Bring next digit (5) of the dividend behind the 14 and repeat the process: 145 / 198

Step 5:
198 goes into 145 0 times with a remainder of 145.
Use 0 as the next digit of our solution. 
Result so far: 410.0
Subtract 0 from 145 to get 145.
Grab the next digit (8) from the dividend, add it to 145, then carry on: 1458 / 198

Moving on to step 6:
When dividing 1458 by 198, we get 7 with a remainder of 72.
Write down 7 as next digit of the result. 
Result so far: 4107.0
Subtract 1386 from 1458 to get 72.
Grab the next digit (8) from the dividend, add it to 72, then carry on: 728 / 198

Step 7:
When dividing 728 by 198, we get 3 with a remainder of 134.
Use 3 as the next digit of our solution. 
Result so far: 41073.0
Deduct 594 from 728 and we're left with 134.
Fetch the next digit (1) from the dividend, attach it to 134 and continue: 1341 / 198

Step 8:
1341 divided by 198 is 6 with a remainder of 153.
Put 6 as the next digit of the answer. 
Result so far: 410736.0
If we subtract 1188 from 1341, we get 153.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1530, and continue the process.

Going ahead to step 9:
When dividing 1530 by 198, we get 7 with a remainder of 144.
Write down 7 as next digit of the result. 
Result so far: 410736.7
Subtracting 1386 from 1530 leaves us with 144.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1440, and continue the process.

Advancing to step 10:
If we divide 1440 by 198, we get 7 and a remainder of 54.
Record the quotient 7 as the next digit in the result. 
Result so far: 410736.77
If we take 1386 away from 1440, we end up with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Our division results in 410736.77 with a remaining 0.054.